US5253677A - Chemical eductor with integral elongated air gap - Google Patents

Chemical eductor with integral elongated air gap Download PDF

Info

Publication number
US5253677A
US5253677A US07934709 US93470992A US5253677A US 5253677 A US5253677 A US 5253677A US 07934709 US07934709 US 07934709 US 93470992 A US93470992 A US 93470992A US 5253677 A US5253677 A US 5253677A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
air
gap
nozzle
eductor
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07934709
Inventor
William F. Sand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delaware Capital Formation Inc
Original Assignee
Hydro Systems Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/44Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4418Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids
    • A47L15/4427Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids entrained in the water supply line by a pressure drop, e.g. resulting from a Venturi throat
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F5/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F5/04Injector mixers, i.e. one or more components being added to a flowing main component
    • B01F5/0403Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F5/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F5/04Injector mixers, i.e. one or more components being added to a flowing main component
    • B01F5/0403Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown
    • B01F5/0413Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown provided with a venturi element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F5/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F5/04Injector mixers, i.e. one or more components being added to a flowing main component
    • B01F5/0403Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown
    • B01F5/0413Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown provided with a venturi element
    • B01F5/0425Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown provided with a venturi element characterized by the place of introduction of the main flow
    • B01F5/043Eductor or eductor type venturi, i.e. the main flow being injected through the venturi with high speed in the form of a jet
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02Plumbing installations for fresh water
    • E03C1/04Water-basin installations specially adapted to wash-basins or baths
    • E03C1/046Adding soap, disinfectant, or the like in the supply line or at the water outlet
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02Plumbing installations for fresh water
    • E03C1/10Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/102Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using an air gap device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F2215/00Auxiliary or complementary information in relation with mixing
    • B01F2215/0001Field of application of the mixing device
    • B01F2215/0077Mixing ingredients comprising detergents, soaps, for washing, e.g. washing machines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/3149Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
    • Y10T137/3185Air vent in liquid flow line
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87571Multiple inlet with single outlet
    • Y10T137/87587Combining by aspiration
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87571Multiple inlet with single outlet
    • Y10T137/87652With means to promote mixing or combining of plural fluids

Abstract

An improved venturi eductor for proportional dispensing of chemicals into flowing water includes a large antisiphoning air gap section to satisfy water system regulations. The air gap section includes an outer wall and an inner wall with a gap between the walls. Both walls include offset windows that provide a circuitous path from the center of the air gap to the exterior of the unit. Passageways extend from the gap to a downstream section of the unit to carry away fluid that might collect in this gap. Further, the shape and location of various orifices within the device creates a slight suction to further limit overspray.

Description

This is a continuation-in-part application, Ser. No. 07/732,469, filed Jul. 18, 1991, entitled "Chemical Eductor With Integral Elongated Air Gap" now U.S. Pat. No. 5,159,958 issued Nov. 3, 1992.

BACKGROUND OF THE INVENTION

It is a common practice for chemicals such as those used for cleaning and sanitizing to be purchased as concentrated liquids. The chemicals are mixed with water to achieve the desired usage concentration. A variety of proportioning dispensers have been developed to achieve this. These dispense mixtures at use concentration. The dispensers often employ venturi devices sometimes called eductors to proportion the chemical and deliver this for use. Water traveling through the central portion of the venturi creates suction which draws the chemical into the water stream. The amount of chemical educted is controlled by a metering orifice in the chemical feed line.

The concentrations desired in this type of chemical dispensing varies greatly ranging from 1:1 to over 1:1000. The devices also must function with a wide range of water pressures, temperatures and dissolved minerals and gases. In some of these conditions, the eductors function much like classical flow venturies, while in other they are more like jet pumps. The devices are mechanically simple, generally without moving parts, but small details of the construction have important influence on their performance.

It is usually desirable to operate these dispensers with water provided directly from the public water supply. In this situation, the dispensers are subject to the regulations of the public water departments who are concerned about preventing any possibility of the chemical concentrates entering the water system. Such an event is known as back flow when caused by positive pressure, back syphoning when the flow is caused by suction in the water system.

A variety of devices and techniques exist to prevent backflow and back syphoning. The most effective mechanical backflow devices and the ones most accepted by the public water departments are relatively large, expensive devices which require regular testing and certification. The installation and inspection of these devices is often more expensive than the acquisition and installation of the dispensers themselves.

The regulations regarding backflow and back syphoning and the research supporting them generally recognize the simple air gap is the most effective protection of all. The simplest illustration of an air gap is a faucet whose end is above the top of the sink. If there is any suction from the water system, it cannot pull in anything from the sink, only air.

It is known to combine a venturi eductor with an air gap for back syphoning protection for dispensing applications. Such devices are described in U.S. Pat. Nos. 4,697,610 and 3,166,086 as well as U.S. Pat. Nos. 3,072,137 and 3,273,866. These function in specific applications. However, their air gaps are generally less than half an inch, and many standards require that the air gap be at least one inch.

In such applications where such a large air gap is employed, it is difficult to control the proportioning of the venturi and also difficult to prevent collateral spray from being emitted from the air gap.

Devices that include baffling to prevent collateral spray are disclosed in Kunstorff U.S. Pat. No. 2,288,247 and Boosey U.S. Pat. No. 2,250,291. Neither of these devices are directed at chemical eductors and therefore they have no concern with effectively proportioning the educted chemical. Further, the structures disclosed in these devices would be unsuitable for chemical eductors. The geometry for a chemical eductor is very precise.

The essential geometry of a venturi is that of an enlargement in a contained stream of fluid. According to Bernoulli's theory, suction is created at the point where the flow channel widens. The operation of the venturi requires that the entering fluid stream have a certain amount of flow energy. For an air gap eductor, this means that the stream must cross the air gap and enter the venturi developing appreciable pressure within the entrance of the venturi.

The geometry which will create this includes a nozzle diameter somewhat larger than the smallest diameter of the front part of the venturi along with a funnel structure leading to this venturi orifice. Not all the water volume from a water jet can enter the venturi and some degree of overflow is created.

The performance of the nozzle is critical for the correct operation of the unit. It must discharge a well defined stream across the air gap and into the venturi inlet.

Such concerns are not present in siphon breakers and back flow preventors for water systems which are merely concerned with backflow. Such critical dimensions are certainly not a problem for chemical eductors that have relatively small air gaps or where those where overspray is not a critical concern.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a chemical eductor which incorporates a long air gap generally at least one inch.

Further, it is an object of the present invention to provide such a chemical eductor which effectively proportions chemicals over a wide range of concentrations.

Further, it is an object of the present invention to provide such an eductor which does not emit overspray from the eductor and which minimizes foaming.

The objects and advantages of the present invention are attained by a chemical eductor assembly which includes an entrance nozzle followed by an elongated air gap chamber followed by a second nozzle leading into a chemical eductor venturi. The air gap chamber has a series of openings. The chamber also includes barriers alongside each opening. The barriers are spaced from the openings to provide a passage from inside the air gap chamber to outside the eductor. Downstream of this is a chamber containing a venturi eductor.

A passageway from the air gap chamber to the chemical eductor chamber is provided. The passageway leads from between the barriers and openings in the air gap chamber. Thus, any liquid that accumulates in between the barriers and openings will flow into the discharge instead of possibly dripping from the air gap chamber openings.

Further, an inner discharge tube is extended below the bottom of the eductor housing to minimize foaming.

The objects and advantages of the present invention will be further appreciated in light of the following detailed description and drawings in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an axial cross-sectional view taken at lines 2--2 of FIG. 1;

FIG. 3 is an overhead cross-sectional view taken at lines 3--3 of FIG. 2;

FIG. 4 is an overhead cross-sectional view taken at lines 4--4 of FIG. 2; and

FIG. 5 is an overhead cross-sectional view taken at lines 5--5 of FIG. 2.

DETAILED DESCRIPTION

The present invention is a chemical eductor 10 which includes an outer body 11 having an upstream water inlet 12, a downstream water outlet 13 and a chemical inlet 14 as shown in FIGS. 1 and 2. The water flows along the central axis 15 of the eductor 10 through an inlet nozzle 24, across an air gap section 17 through the eductor section 18 into the collection section 19.

Upstream of the inlet nozzle 24 is a threaded inlet 21 adapted to screw onto a water source (not shown). At the downstream side of the threaded inlet 21 is a flow stabilizer shown as a set of strainers 22 which are held in place by washer 23. The flow stabilizer serves to help the nozzle deliver a dense, columnar stream. This in turn leads to truncated, converging nozzle 24 which terminates at orifice 26.

Orifice 26 is directly centered along the central axis or axial flow path 15 of the eductor 10. Downstream of the nozzle 24 is the air gap chamber 17. Air gap chamber 17 includes an exterior tubular body 31 with a plurality of oval windows 32 (two shown in FIGS. 2 and 3). The top 42 of the windows is above the outlet of nozzle 24, and the distance between outlet of nozzle 24 and the bottom of the windows is at least one inch.

Located within the air gap chamber 17 is an insert 36 which includes an annular disc base 37 and barrier means which are in line with the windows 32. The barrier means is shown as a tubular body 38 concentric to body 31. Barrier body 38 is shown with a plurality of windows 39 (two shown in FIG. 3) which are offset 90° from windows 32. The tops and bottoms of windows 39 are located relative to nozzle 24 in the same way as are windows 32.

As shown in FIGS. 2 and 3, an upper edge 43 of barrier wall 38 extends above the upper (upstream) edges 42 of windows 32, respectively. Barrier body 38 is spaced from tubular body 31 a distance effective to permit fluid flow in the event of siphoning. Generally, this distance should be at least 0.09". A plurality of passageways 35 extend from the area 45 between tubular bodies 31 and 38 down to the collection section 19. Passageways 35 are shown immediately below windows 39.

The disc base 37 includes a central opening or orifice 50. The orifice 50 is aligned again with the central axis 15 of the eductor. This orifice opens to the eductor section 18. Disc base 37 is optional and can be eliminated providing a clear opening from nozzle 24 to nozzle 55. It can also be sloped downwardly if desired.

Eductor section 18 includes an eductor nozzle 55 which is spaced about half an inch from the orifice 50 of disc portion 37. The eductor nozzle 55 includes an entrance or upstream opening 56 which leads through a sloped conical portion 57 to an orifice 58. With collector unit 19 are overflow passages extending from the area upstream of nozzle 55 to the collection section 19.

As shown more particularly in FIG. 2, the overflow passages 61 bypass the eductor section 18 and lead to collection section 19 beneath the eductor section 18.

The eductor section 18 downstream of the air gap section 17 includes a chamber 59 and a chemical feed passage 64 which passes from the chemical inlet 14 to the downstream side of orifice 58.

Downstream of orifice 58 is the venturi diffuser tube 65 which includes an inlet 65a and an outlet 65b. The interior wall 67 of venturi 65 as shown is slightly tapered at about 2°. The inlet 65a of the venturi tube is shown approximately 3/32 of an inch from the orifice 58. Slightly downstream of the opening 65a within the venturi tube 65 is a flooder pin 66 (FIGS. 2 and 5) which is used to cause a small turbulence in the diffuser to assure that the flowing water completely fills the diffuser, even at low water flows. Other means can be used to flood the diffuser, including a flow obstruction at the end of the diffuser. The venturi tube 65 resides within collection section 19 and leads to outlet 13.

In use, a discharge tube 72 is fixed to outlet 13 to transport fluid. An optional tubular extension 73 which serves to reduce foaming is shown extending from the venturi tube 65 beyond and downstream of outlet 13 into the discharge tube 72.

In operation, the threaded inlet 21 is connected to a source of water such as a hose or faucet. The threaded chemical inlet 14 is attached to a source of chemical such as a jug of liquid washing solution. Turning the water supply on forces water through the stabilizing strainer 22 through nozzle 24. This will create a narrow stream of water which will pass directly through the center of the air gap chamber 17 through the opening 50 in the disc base 37 striking the conical section 57 of educator nozzle 55.

The water will then force its way through the orifice 58 and continue to the venturi diffuser 65. There it will expand and create a suction within the chamber 59 connected to 64. This will in turn draw the chemical from the supply through the chemical inlet 14 and passage 64 where it will mix in chamber 59 with the water passing through the orifice of the venturi tube 65.

Some water which strikes the sloped portion 57 of the educator nozzle 55 will overflow and spray. The disc plate 37 acts as a spray shield. The overflowed water drains through passageways 61 into the collection section 19. Mist that passes up beyond disc plate 37 and through windows 39 will collect in area 45 and flow through passageways 35 into collection section 19. A slight negative pressure in chamber 19 from operation of the educator promotes this flow.

There is also a slight negative pressure through passageways 35. Thus, overspray or mist is pulled down these passageways.

If there should be suction from the water supply, the one inch air gap 17 provided in the air gap chamber will prevent any of the chemical entering through entrance 14 from being drawn into the water supply because air would be pulled in through the windows 32 instead of chemical or diluted solution being pulled up.

The relationship between the sizes of orifices of nozzle 24 and 58 greatly influence performance. Best results are obtained when at least 15% of the flow through nozzle 24 overflows the entrance of 58. The included angle of the lead-in to 58 should be at least 30 degrees since a sharper angle does not allow a smooth overflowing.

The diameter of 65a should be at least about 0.030" greater than that of 58 and may be much greater to allow rich mixtures. Exact educator performance is optimized for specific tasks by modifying key features including nozzles 24 and 58, lead-in 57, and the diameter, length, and flare of the bore of the diffuser 65.

There are obviously many different ways that the educator of the present invention can be manufactured and modified and designed, yet still incorporate the features of the present invention. For example, the windows 39 in barrier body 38 can be lengthened into slots. This would leave two arcuate tabs in place of body 38. Further, the disc 37 can be eliminated if desired. Tubular extension 13 is preferred but optional.

Claims (6)

Accordingly, the invention should only be defined by the appended claims wherein I claim:
1. A chemical eductor with integral air gap comprising a water inlet and a first nozzle;
an elongated air gap chamber between said first nozzle and a second venturi nozzle downstream of said first nozzle said air gap chamber having an outer wall and at least one window, a barrier spaced from said outer wall blocking each of said windows, said barrier having one or more openings offset from each of said windows in said outer wall;
a venturi diffuser tube downstream of said second venturi nozzle;
a chemical inlet into an area between said second venturi nozzle and said venturi diffuser;
an overspray chamber above said second venturi nozzle communicating with a collection chamber downstream of said second nozzle passage means extending from inside the outer wall of said air gap chamber to said collection chamber.
2. The chemical eductor claimed in claim 1 further comprising a third nozzle downstream of said air gap section and upstream of said second venturi nozzle.
3. The apparatus claimed in claim 2 wherein said second venturi nozzle includes a truncated conical inlet larger than the third nozzle.
4. The apparatus claimed in claim 1 wherein said outer wall has two windows and said barriers has two windows offset from said windows of said outer wall by 90°.
5. The eductor claimed in claim 4 wherein said inner wall is spaced at least 0.09" from said outer wall of said air gap section.
6. The eductor claimed in claim 1 having an outer discharge orifice and wherein said eductor section has a discharge tube which extends through and downstream of said discharge orifice.
US07934709 1991-07-18 1992-08-24 Chemical eductor with integral elongated air gap Expired - Lifetime US5253677A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US07732469 US5159958A (en) 1991-07-18 1991-07-18 Chemical eductor with integral elongated air gap
US07934709 US5253677A (en) 1991-07-18 1992-08-24 Chemical eductor with integral elongated air gap

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07934709 US5253677A (en) 1991-07-18 1992-08-24 Chemical eductor with integral elongated air gap
PCT/US1993/000349 WO1994004857A1 (en) 1992-08-24 1993-01-14 Chemical eductor with integral elongated air gap
EP19930903500 EP0657002A4 (en) 1992-08-24 1993-01-14 Chemical eductor with integral elongated air gap.

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07732469 Continuation-In-Part US5159958A (en) 1991-07-18 1991-07-18 Chemical eductor with integral elongated air gap

Publications (1)

Publication Number Publication Date
US5253677A true US5253677A (en) 1993-10-19

Family

ID=25465934

Family Applications (1)

Application Number Title Priority Date Filing Date
US07934709 Expired - Lifetime US5253677A (en) 1991-07-18 1992-08-24 Chemical eductor with integral elongated air gap

Country Status (3)

Country Link
US (1) US5253677A (en)
EP (1) EP0657002A4 (en)
WO (1) WO1994004857A1 (en)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518020A (en) * 1994-06-14 1996-05-21 Dema Engineering Co. Proportioner
US5522419A (en) * 1995-06-26 1996-06-04 Hydro Systems Company Chemical eductor with integral elongated air gap
WO1996026156A2 (en) * 1995-02-23 1996-08-29 Ecolab Inc. Apparatus and method for dispensing a viscous use solution
US5592964A (en) * 1994-08-11 1997-01-14 Traylor; Paul L. Air gap anti-siphon System
EP0785314A1 (en) 1996-01-16 1997-07-23 S.C. Johnson & Son, Inc. Improved back flow prevention device
US5673725A (en) * 1996-06-10 1997-10-07 Knight Equipment International, Inc. Air gap device with interchangeable parts
WO1997038617A1 (en) * 1996-04-18 1997-10-23 S.C. Johnson Commercial Markets, Inc. Improved mixing eductor
US5839474A (en) 1996-01-19 1998-11-24 Sc Johnson Commercial Markets, Inc. Mix head eductor
US5862948A (en) 1996-01-19 1999-01-26 Sc Johnson Commerical Markets, Inc. Docking station and bottle system
US5862829A (en) * 1997-02-20 1999-01-26 Hydor Systems Company Air gap eductor
US6000418A (en) * 1997-03-20 1999-12-14 International Business Machines Corporation Integrated dynamic fluid mixing apparatus and method
US6331141B1 (en) * 1996-06-20 2001-12-18 Boon Pen Chua Fluid extraction apparatus
WO2002030578A1 (en) 2000-10-13 2002-04-18 Hydro Systems Company Remotely activated dispenser
US6453935B1 (en) 2001-07-02 2002-09-24 E-Z Flo Injection Systems, Inc. Fluid injector with vent/proportioner ports
US6499872B2 (en) * 1999-03-23 2002-12-31 Hydro Systems Company Ultra-lean dilution apparatus
WO2003026785A1 (en) * 2001-09-25 2003-04-03 Hydro Systems Company Multiple chemical product eductive dispenser
US6604546B1 (en) 2001-07-02 2003-08-12 E-Z Flo Injection Systems, Inc. Hose-end chemical delivery system
US6607174B2 (en) 2001-10-17 2003-08-19 Dema Engineering Company Dispensing apparatus with in-line actuator
US6611971B1 (en) * 2002-08-26 2003-09-02 I.W. Industries, Inc. Hand spray mounts with integral backflow prevention
US6648003B2 (en) 2001-08-02 2003-11-18 Dema Engineering Company Backflow preventer
US20050084414A1 (en) * 2003-10-17 2005-04-21 Treiman Michael T. Chemical proportioning and dispensing systems
US20050109695A1 (en) * 2003-09-30 2005-05-26 Laurent Olivier Autotrofic sulfur denitration chamber and calcium reactor
US20050109697A1 (en) * 2003-10-03 2005-05-26 Laurent Olivier Waste water treatment system and process
US20060112895A1 (en) * 2004-05-11 2006-06-01 Laurent Olivier System for raising aquatic animals
US20060283502A1 (en) * 2005-06-15 2006-12-21 Hood Larry J Air gap fitting
US20070028980A1 (en) * 2005-08-02 2007-02-08 Lohr James H Mixing eductor
US20070034644A1 (en) * 2005-08-11 2007-02-15 Bertucci Michael H Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
USD666868S1 (en) 2005-08-12 2012-09-11 Diversey, Inc. Multi-station liquid dispensing apparatus
WO2013011486A1 (en) * 2011-07-20 2013-01-24 Seko S.P.A. Mixing apparatus assembly with air gap separation, in particular for backflow prevention
US20130112285A1 (en) * 2011-10-04 2013-05-09 Brightwell Dispensers Limited Venturi eductor with adjustable flow restrictor
US9732862B2 (en) 2005-08-11 2017-08-15 Diversey, Inc. Two educator/four-way selector valve assembly

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2137882B1 (en) 1997-12-04 2000-08-16 Fullola Francisco Alonso Automatic dispenser for hygienic and disinfectant products for everyday use for people.
DE60203611T2 (en) 2001-05-14 2005-09-08 JohnsonDiversey, Inc., Sturtevant mixing nozzle
EP1350757A1 (en) 2002-03-27 2003-10-08 JohnsonDiversey, Inc. Flow restriction device
JP2006500193A (en) * 2002-04-09 2006-01-05 ジョンソンディバーシー・インコーポレーテッド Eductor
EP1353012A1 (en) 2002-04-09 2003-10-15 JohnsonDiversey, Inc. Eductor

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216557C (en) *
US1102505A (en) * 1913-01-06 1914-07-07 James Morrison Brass Mfg Company Ltd Water-jet lifter.
US1195915A (en) * 1916-08-22 Steam-jet
US2250291A (en) * 1939-07-22 1941-07-22 Edward W N Boosey Vacuum breaker for water systems
US2288247A (en) * 1940-05-27 1942-06-30 Kunstorff Werner Vacuum breaker
US3072137A (en) * 1963-01-08 Fluid mixing device
US3166086A (en) * 1963-01-10 1965-01-19 Bela Deutsch Fluid mixing device
US3273866A (en) * 1963-03-12 1966-09-20 Lancy Lab Constant flow aerator and siphon breaker
DE1428452A1 (en) * 1964-08-25 1969-01-09 Licentia Gmbh Drain hose for dishwasher or washing machine
US3826474A (en) * 1972-09-18 1974-07-30 Lear Siegler Inc Jet agitator assembly
US3865136A (en) * 1971-04-29 1975-02-11 Eke Verschuur Oil/water pipeline inlet with oil supply via a large chamber
US4416610A (en) * 1980-03-14 1983-11-22 Hydroil, Inc. Water-in-oil emulsifier and oil-burner boiler system incorporating such emulsifier
US4633909A (en) * 1984-04-06 1987-01-06 Degremont Apparatus for the rapid in-line mixing of two fluids
US4697610A (en) * 1986-10-16 1987-10-06 Hydro Systems Company Faucet proportioner
US4721126A (en) * 1985-09-09 1988-01-26 Kiyoshi Horii Method of generating spiral fluid flow and the device therefor

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216557C (en) *
US1195915A (en) * 1916-08-22 Steam-jet
US3072137A (en) * 1963-01-08 Fluid mixing device
US1102505A (en) * 1913-01-06 1914-07-07 James Morrison Brass Mfg Company Ltd Water-jet lifter.
US2250291A (en) * 1939-07-22 1941-07-22 Edward W N Boosey Vacuum breaker for water systems
US2288247A (en) * 1940-05-27 1942-06-30 Kunstorff Werner Vacuum breaker
US3166086A (en) * 1963-01-10 1965-01-19 Bela Deutsch Fluid mixing device
US3273866A (en) * 1963-03-12 1966-09-20 Lancy Lab Constant flow aerator and siphon breaker
DE1428452A1 (en) * 1964-08-25 1969-01-09 Licentia Gmbh Drain hose for dishwasher or washing machine
US3865136A (en) * 1971-04-29 1975-02-11 Eke Verschuur Oil/water pipeline inlet with oil supply via a large chamber
US3826474A (en) * 1972-09-18 1974-07-30 Lear Siegler Inc Jet agitator assembly
US4416610A (en) * 1980-03-14 1983-11-22 Hydroil, Inc. Water-in-oil emulsifier and oil-burner boiler system incorporating such emulsifier
US4633909A (en) * 1984-04-06 1987-01-06 Degremont Apparatus for the rapid in-line mixing of two fluids
US4721126A (en) * 1985-09-09 1988-01-26 Kiyoshi Horii Method of generating spiral fluid flow and the device therefor
US4697610A (en) * 1986-10-16 1987-10-06 Hydro Systems Company Faucet proportioner

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518020A (en) * 1994-06-14 1996-05-21 Dema Engineering Co. Proportioner
US5797420A (en) * 1994-06-14 1998-08-25 Dema Engineering Co. Proportioner
US5592964A (en) * 1994-08-11 1997-01-14 Traylor; Paul L. Air gap anti-siphon System
WO1996026156A3 (en) * 1995-02-23 1996-10-17 Ecolab Inc Apparatus and method for dispensing a viscous use solution
WO1996026156A2 (en) * 1995-02-23 1996-08-29 Ecolab Inc. Apparatus and method for dispensing a viscous use solution
US5816446A (en) * 1995-02-23 1998-10-06 Ecolab Inc. Dispensing a viscous use solution by diluting a less viscous concentrate
US5522419A (en) * 1995-06-26 1996-06-04 Hydro Systems Company Chemical eductor with integral elongated air gap
WO1997001681A1 (en) * 1995-06-26 1997-01-16 Hydro Systems Company Chemical eductor with integral elongated air gap
US5678592A (en) * 1996-01-16 1997-10-21 S. C. Johnson & Son, Inc. Back flow prevention device
EP0785314A1 (en) 1996-01-16 1997-07-23 S.C. Johnson & Son, Inc. Improved back flow prevention device
US5954240A (en) 1996-01-19 1999-09-21 S. C. Johnson Commercial Markets, Inc. Docking station and bottle system
US6129125A (en) 1996-01-19 2000-10-10 Sc Johnson Commercial Markets, Inc. Docking station and bottle system
US5839474A (en) 1996-01-19 1998-11-24 Sc Johnson Commercial Markets, Inc. Mix head eductor
US5862948A (en) 1996-01-19 1999-01-26 Sc Johnson Commerical Markets, Inc. Docking station and bottle system
WO1997038617A1 (en) * 1996-04-18 1997-10-23 S.C. Johnson Commercial Markets, Inc. Improved mixing eductor
US5927338A (en) * 1996-04-18 1999-07-27 S.C. Johnson Commercial Markets, Inc. Mixing eductor
EP1129659A3 (en) * 1996-04-18 2001-11-28 S.C.Johnson Commercial Markets, Inc. Improved mixing eductor
US6279598B1 (en) 1996-04-18 2001-08-28 S. C. Johnson Commercial Markets, Inc. Mixing eductor
US5673725A (en) * 1996-06-10 1997-10-07 Knight Equipment International, Inc. Air gap device with interchangeable parts
US6331141B1 (en) * 1996-06-20 2001-12-18 Boon Pen Chua Fluid extraction apparatus
US5862829A (en) * 1997-02-20 1999-01-26 Hydor Systems Company Air gap eductor
US6000418A (en) * 1997-03-20 1999-12-14 International Business Machines Corporation Integrated dynamic fluid mixing apparatus and method
US6499872B2 (en) * 1999-03-23 2002-12-31 Hydro Systems Company Ultra-lean dilution apparatus
WO2002030578A1 (en) 2000-10-13 2002-04-18 Hydro Systems Company Remotely activated dispenser
US6604546B1 (en) 2001-07-02 2003-08-12 E-Z Flo Injection Systems, Inc. Hose-end chemical delivery system
US6453935B1 (en) 2001-07-02 2002-09-24 E-Z Flo Injection Systems, Inc. Fluid injector with vent/proportioner ports
US6648003B2 (en) 2001-08-02 2003-11-18 Dema Engineering Company Backflow preventer
WO2003026785A1 (en) * 2001-09-25 2003-04-03 Hydro Systems Company Multiple chemical product eductive dispenser
US6607174B2 (en) 2001-10-17 2003-08-19 Dema Engineering Company Dispensing apparatus with in-line actuator
US6757920B2 (en) 2002-08-26 2004-07-06 I.W. Industries. Inc. Hand spray mounts with integral backflow prevention
US6611971B1 (en) * 2002-08-26 2003-09-02 I.W. Industries, Inc. Hand spray mounts with integral backflow prevention
US20040034920A1 (en) * 2002-08-26 2004-02-26 Frank Antoniello Hand spray mounts with integral backflow prevention
US7442306B2 (en) 2003-09-30 2008-10-28 Laurent Olivier Autotrofic sulfur denitration chamber and calcium reactor
US20050109695A1 (en) * 2003-09-30 2005-05-26 Laurent Olivier Autotrofic sulfur denitration chamber and calcium reactor
US20090261486A1 (en) * 2003-09-30 2009-10-22 Ok Technologies Llc Mixing eductor
US20050133423A1 (en) * 2003-09-30 2005-06-23 Laurent Olivier Autotrofic sulfur denitration chamber and calcium reactor
US7244356B2 (en) 2003-09-30 2007-07-17 Laurent Olivier Autotrofic sulfur denitration chamber and calcium reactor
US7731163B2 (en) 2003-09-30 2010-06-08 Laurent Olivier Mixing eductor
US7025883B1 (en) 2003-09-30 2006-04-11 Ok Technologies, Llc Autotrofic sulfur denitration chamber and calcium reactor
US20050109697A1 (en) * 2003-10-03 2005-05-26 Laurent Olivier Waste water treatment system and process
US7481935B2 (en) 2003-10-03 2009-01-27 Laurent Olivier Waste water treatment process
US7163617B2 (en) 2003-10-17 2007-01-16 Platinum Technologies Company, Llc Chemical proportioning and dispensing systems
US20050084414A1 (en) * 2003-10-17 2005-04-21 Treiman Michael T. Chemical proportioning and dispensing systems
US20060112895A1 (en) * 2004-05-11 2006-06-01 Laurent Olivier System for raising aquatic animals
US20080236505A1 (en) * 2004-05-11 2008-10-02 Ok Technologies, Llc System for raising animals
US20060283502A1 (en) * 2005-06-15 2006-12-21 Hood Larry J Air gap fitting
US8336569B2 (en) 2005-08-02 2012-12-25 Diversey, Inc. Mixing eductor
US20070028980A1 (en) * 2005-08-02 2007-02-08 Lohr James H Mixing eductor
US20110232774A1 (en) * 2005-08-02 2011-09-29 Diversey, Inc. Mixing eductor
US7954507B2 (en) 2005-08-02 2011-06-07 Diversey, Inc. Mixing eductor
US20080223448A1 (en) * 2005-08-02 2008-09-18 Johnsondiversey, Inc. Mixing Eductor
US8584716B2 (en) 2005-08-11 2013-11-19 Diversey, Inc. Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
US7963304B2 (en) 2005-08-11 2011-06-21 Diversey, Inc. Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
US7516763B2 (en) 2005-08-11 2009-04-14 Johnsondiversey, Inc. Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
US9732862B2 (en) 2005-08-11 2017-08-15 Diversey, Inc. Two educator/four-way selector valve assembly
US20070034644A1 (en) * 2005-08-11 2007-02-15 Bertucci Michael H Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
US9174179B2 (en) 2005-08-11 2015-11-03 Diversey, Inc. Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
US20100000618A1 (en) * 2005-08-11 2010-01-07 Johnsondiversey, Inc. Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
US9809443B2 (en) 2005-08-11 2017-11-07 Diversey, Inc. Multi-station liquid dispensing apparatus with automatic selection of proper flow rate
USD666868S1 (en) 2005-08-12 2012-09-11 Diversey, Inc. Multi-station liquid dispensing apparatus
WO2013011486A1 (en) * 2011-07-20 2013-01-24 Seko S.P.A. Mixing apparatus assembly with air gap separation, in particular for backflow prevention
US9375688B2 (en) 2011-07-20 2016-06-28 Seko S.P.A. Mixing apparatus assembly with air gap separation, in particular for backflow prevention
US8905079B2 (en) * 2011-10-04 2014-12-09 Brightwell Dispensers Limited Venturi eductor with adjustable flow restrictor
US20130112285A1 (en) * 2011-10-04 2013-05-09 Brightwell Dispensers Limited Venturi eductor with adjustable flow restrictor

Also Published As

Publication number Publication date Type
EP0657002A1 (en) 1995-06-14 application
EP0657002A4 (en) 1997-05-02 application
WO1994004857A1 (en) 1994-03-03 application

Similar Documents

Publication Publication Date Title
US3304564A (en) Apparatus for cleaning a body of liquid and maintaining its level
US3473481A (en) Venturi arrangement
US3381899A (en) Spray gun
US4912782A (en) Fluid spout providing lamelliform outflow
US2646063A (en) Back flow preventer
US5850973A (en) Double barrel sprayer for selective spraying of water or diluted product and use thereof
US4618426A (en) Retrievable jet mixing systems
US3456801A (en) Apparatus for feeding dry particulate chlorinating reagent into a swimming pool
US5242119A (en) Laminar spout attachment
US20060005310A1 (en) Flush toilet
US4168705A (en) Float and check valve for hydrotherapy unit air intake
EP0155186A1 (en) Venturi liquid evacuator system for maintaining clear vapor path in vapor recovery hose
US4675924A (en) Emergency eye wash fountain
US4687033A (en) Venturi liquid evacuator system for maintaining clear vapor path in vapor recovery hose
US4347224A (en) Chemical dispenser
US3652015A (en) Nebulizer
US5925292A (en) Water charging machine
US3620241A (en) Combination plumbing fixture for water purification system having waste bypass flow
US4623095A (en) Liquid adding apparatus and method for a shower fixture
US5111994A (en) Flow booster apparatus
US3287885A (en) Air separator for drain pipes
US3411162A (en) Toilet bowl construction
US5170518A (en) Emergency eye and body wash station
US5154355A (en) Flow booster apparatus
US6450418B1 (en) Pool/spa waterfall apparatus with an interchangeable outlet cap

Legal Events

Date Code Title Description
AS Assignment

Owner name: HYDRO SYSTEMS COMPANY, A CORP. OF OHIO, OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SAND, WILLIAM F.;REEL/FRAME:006242/0713

Effective date: 19920819

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: DELAWARE CAPITAL FORMATION, DELAWARE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HYDRO SYSTEMS COMPANY;REEL/FRAME:010485/0226

Effective date: 19991214

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12